- vsnet-outburst - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-outburst 31679] Activity (2026-07-02)
by Hiroyuki Maehara 02 Jul '26

02 Jul '26

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code AT2026rdg 20260702.524 122 Mhh.VSOLJ CYGSS 20260702.526 84 Mhh.VSOLJ HERAH 20260702.535 125 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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[vsnet-outburst 31678] WX Cet: 2026 outburst, possible superoutburst
by Kojiguchi 23 Jun '26

23 Jun '26

WX Cet: 2026 outburst, possible superoutburst Gavin Ramsay reported that GOTO detected WX Cet in outburst on 2026 June 22. Reported magnitude: L = 11.9 (~400–700 nm). Additionally, ATLAS Forced Photometry data reveals that the outburst had already started on 2026 June 19, reaching 11.79 mag. This is its first detected outburst since 2022, and it is a possible superoutburst.

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[vsnet-outburst 31677] Outbursts 14/06/2026
by Rod Stubbings 15 Jun '26

15 Jun '26

Outbursts detected. object YYMMDD(UT) mag code remarks AQLFO 260614.576 138 Stu.RASNZ outburst ARABF 260614.432 140 Stu.RASNZ outburst CENMU 260614.563 129 Stu.RASNZ outburst CENV373 260614.564 136 Stu.RASNZ outburst CENV803 260614.573 134 Stu.RASNZ outburst CMAHL 260614.378 120 Stu.RASNZ outburst CNCGZ 260614.388 142 Stu.RASNZ outburst CRTBF 260614.512 149 Stu.RASNZ outburst HYIVW 260614.399 92 Stu.RASNZ outburst MUSDQ 260614.552 152 Stu.RASNZ outburst NORAB 260614.370 137 Stu.RASNZ outburst PUPCL 260614.387 155 Stu.RASNZ outburst SGRV729 260614.509 146 Stu.RASNZ outburst SGRV3774 260614.440 150 Stu.RASNZ outburst TRADV 260614.421 128 Stu.RASNZ outburst ASASSN-19CT 260614.519 136 Stu.RASNZ outburst -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31676] Recent outbursts
by Rod Stubbings 09 Jun '26

09 Jun '26

Recent outbursts. object YYMMDD(UT) mag code remarks ARAV793 260608.444 149 Stu.RASNZ outburst CENMU 260608.562 142 Stu.RASNZ outburst CENV485 260608.594 154 Stu.RASNZ outburst CENV803 260608.604 136 Stu.RASNZ outburst CHAST 260608.627 136 Stu.RASNZ outburst CNCGZ 260606.403 139 Stu.RASNZ outburst HYAMM 260606.415 147 Stu.RASNZ outburst HYAV392 260607.489 154 Stu.RASNZ outburst INDTU 260608.576 143 Stu.RASNZ outburst LEOX 260606.405 130 Stu.RASNZ outburst NORHP 260607.415 155 Stu.RASNZ outburst PUPUY 260607.370 144 Stu.RASNZ outburst PUPBV 260606.397 141 Stu.RASNZ outburst PUPBX 260606.396 152 Stu.RASNZ outburst PUPHO 260607.372 139 Stu.RASNZ outburst PYXVZ 260606.417 124 Stu.RASNZ outburst SCOFQ 260607.415 135 Stu.RASNZ outburst SGRV730 260606.537 150 Stu.RASNZ outburst SGRV1089 260608.569 142 Stu.RASNZ outburst VELBB 260607.427 135 Stu.RASNZ outburst VOLSY 260606.425 156 Stu.RASNZ outburst NSV 11274 260608.485 154 Stu.RASNZ outburst LMC V3434 260606.378 144 Stu.RASNZ outburst SSS 111226:094327-272039 260608.446 136 Stu.RASNZ outburst CRTS J124507.8-381322 260608.599 132 Stu.RASNZ outburst CTCVJ1940-4724 260608.566 138 Stu.RASNZ outburst CMISV 260609.345 128 Stu.RASNZ outburst OPHV699 260609.439 147 Stu.RASNZ outburst PAVAS 260609.467 152 Stu.RASNZ outburst SCOV598 260609.366 153 Stu.RASNZ outburst -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31675] TCP J00560713+4301406: new large-amplitude outburst, likely a dwarf nova
by Yusuke Tampo 01 Jun '26

01 Jun '26

TCP J00560713+4301406: new large-amplitude outburst, likely a dwarf nova TCP J00560713+4301406 was discovered at 12.2 mag on 2026 06 01.4 UTC. http://www.cbat.eps.harvard.edu/unconf/followups/J00560713+4301406.html ATLAS also detected this outburst on 2026 05 31.6 UTC around 15.5 mag, likely on the rise. There is a possible counterpart at ~3" away; Gaia 375654744699712512 at ~20.36 mag, thus, the outburst amplitude is ~8 mag. Its blue color (BP-RP~0.34 mag) and distance 1049(-400/+1016) pc are consistent with a counterpart being a CV with a low mass-transfer rate. Although the visibility is not great, time-resolved photometry or snap spectroscopy to confirm its nature is encouraged. Best regards, Yusuke -- ---------------------------------------------- South African Astronomical Observatory, Postdoc fellow Yusuke TAMPO / 反保雄介 EMAIL: tampo(a)kusastro.kyoto-u.ac.jp ALT. EMAIL: yusuke(a)saao.ac.za ----------------------------------------------

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[vsnet-outburst 31674] TCPJ15030519+2202041: the 2nd superoutburst
by Keisuke Isogai 28 May '26

28 May '26

TCPJ15030519+2202041: the 2nd superoutburst Itoh-san reported that this object was brightening last night. The current brightness should be from 16 to 15 mag. Now is a good opportunity to detect the growing superhump and estimate the binary parameters. Further observations are strongly encouraged.

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[vsnet-outburst 31673] TCPJ15030519+2202041: growing superhumps appeared, and will undergo the next superoutburst soon
by Keisuke Isogai 28 May '26

28 May '26

TCPJ15030519+2202041: growing superhumps will drive the next superoutburst soon Josch Hambsch, Itoh-san, Moriyama-san, and we have observed this object. The object is at about 18.8 mag now, slightly brighter than it was several days ago. Also, we detected a clear superhump tonight. This must be the growing (stage A) superhump. In this situation, this object will undergo the next superoutburst with ordinary superhumps soon. The continuous time-resolved observations are strongly encouraged. Although the current brightness of 18.8 mag is very faint for many observers, this object will brighten to about 15 mag within a few days.

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[vsnet-outburst 31672] Recent activity
by Rod Stubbings 15 May '26

15 May '26

Outbursts and recent activity. object YYMMDD(UT) mag code remarks AQLUU 260513.638 122 Stu.RASNZ active AQLUU 260514.612 127 Stu.RASNZ active ARABF 260515.420 145 Stu.RASNZ outburst ARAV793 260514.462 150 Stu.RASNZ outburst ARAV793 260515.402 150 Stu.RASNZ active CENV442 260513.590 150 Stu.RASNZ outburst CENV442 260514.582 157 Stu.RASNZ active CENV485 260513.615 154 Stu.RASNZ outburst CENV803 260513.386 138 Stu.RASNZ active CENV803 260514.387 139 Stu.RASNZ active CHAST 260513.628 143 Stu.RASNZ active CHAST 260514.537 143 Stu.RASNZ active CHAST 260515.388 144 Stu.RASNZ active CMAWZ 260513.396 146 Stu.RASNZ outburst CMAWZ 260515.383 147 Stu.RASNZ active CMADM 260513.392 151 Stu.RASNZ outburst CMAHL 260513.392 116 Stu.RASNZ active CMAHL 260514.403 118 Stu.RASNZ active CMISV 260514.376 143 Stu.RASNZ outburst CNCSY 260513.367 117 Stu.RASNZ outburst CNCSY 260514.399 115 Stu.RASNZ active CNCGZ 260514.398 150 Stu.RASNZ outburst CNCGZ 260515.367 134 Stu.RASNZ active HYAAG 260514.472 160 Stu.RASNZ outburst HYIVW 260514.408 125 Stu.RASNZ outburst HYIVW 260514.540 119 Stu.RASNZ active HYIVW 260514.646 118 Stu.RASNZ active HYIVW 260515.371 96 Stu.RASNZ active LEOX 260513.416 130 Stu.RASNZ active LEOX 260514.425 130 Stu.RASNZ active LEOX 260515.367 128 Stu.RASNZ active NORIK 260513.449 132 Stu.RASNZ outburst NORIK 260514.456 135 Stu.RASNZ active NORIK 260515.390 135 Stu.RASNZ active ORIV1159 260513.354 131 Stu.RASNZ outburst ORIV1159 260514.369 134 Stu.RASNZ active PAVAS 260513.583 153 Stu.RASNZ outburst PUPBV 260513.411 137 Stu.RASNZ outburst PUPBV 260514.420 132 Stu.RASNZ active PUPBX 260513.410 148 Stu.RASNZ outburst PUPBX 260514.419 155 Stu.RASNZ active PUPCL 260513.412 155 Stu.RASNZ outburst SCOV478 260514.486 152 Stu.RASNZ active SERUZ 260514.587 133 Stu.RASNZ active SGRV730 260513.575 148 Stu.RASNZ outburst SGRV730 260514.570 146 Stu.RASNZ active TRADV 260513.421 130 Stu.RASNZ outburst TRADV 260514.442 130 Stu.RASNZ active TRADV 260515.416 130 Stu.RASNZ active VELV383 260513.584 137 Stu.RASNZ outburst VIRHS 260513.385 140 Stu.RASNZ active VIRHS 260514.394 141 Stu.RASNZ active VIRHS 260515.427 141 Stu.RASNZ active VOLSY 260513.456 146 Stu.RASNZ outburst ASASSN-14BP 260513.625 145 Stu.RASNZ outburst ASASSN-14BP 260514.609 145 Stu.RASNZ active ASASSN-14FE 260513.359 146 Stu.RASNZ outburst ASASSN-14FE 260514.357 148 Stu.RASNZ active NSV 11274 260514.541 150 Stu.RASNZ outburst DDE 76 260513.431 133 Stu.RASNZ outburst DDE 76 260514.435 130 Stu.RASNZ active DDE 76 260515.387 134 Stu.RASNZ active -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31671] TCP J07151825+4753167 and TCP J15030519+2202041: new hydrogen-rich and helium-rich WZ Sge-type dwarf novae
by Hiromasa Hoke 11 May '26

11 May '26

Dear all, We posted the photometric follow-up results by Itoh-san and Moriyama-san for TCP J15030519+2202041 and our spectroscopic follow-up results for TCP J15030519+2202041 and TCP J07151825+4753167 to ATel. https://www.astronomerstelegram.org/?read=17791 We concluded that J0715+4753 is a new WZ Sge-type dwarf nova because Hα has a narrow emission core and its spectrum shows a blue continuum with the Balmer and HeI absorption lines. J1503+2202 is a new AM CVn-type dwarf nova because this object has HeI absorption lines, a temperature of ~25,000K and possible early superhump period of 0.0303(1) d. Follow-up observations are important. Especially, TCPJ1503+2202 is a long-period AM CVn star, and the opportunity to observe such an event is rare. Continuous time-series observations are strongly encouraged. best regard, Hiromasa Hoke

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[vsnet-outburst 31670] SDSS J113551.09+532246.2
by Jeremy Shears 04 May '26

04 May '26

SDSS J113551.09+532246.2 May 4.914 16.6 C Jeremy Shears

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